High Charts resize bug

by Anuradha Pai

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/highcharts/5.0.10/highcharts.js"></script>
<button id="firstClick">Resize to Specific</button><br>
<br>
<button id="secondClick">Go back to Auto-sizing</button><br>

<div id="container" style="height: 300px"></div>

JavaScript

var chart = new Highcharts.Chart({
    legend: {
        enabled: true,
        backgroundColor: '#FFFFFF',
        borderWidth: 0,
        itemStyle: {
            fontFamily: 'Arial',
            fontSize: '10px'
        },
        align: 'right',
        layout: 'vertical',
        floating: false,
        verticalAlign: 'top',
        y: 35
    },
    chart: {
        renderTo: 'container',
        animation: false,
        backgroundColor: '#ffffff',
        zoomType: 'xy',
        alignTicks: false,
        defaultSeriesType: 'spline'
    },
    xAxis: {
        title: {
            text: 'Time',
            style: {
                fontWeight: 'normal',
                color: '#232323',
                fontFamily: 'Arial',
                fontSize: '11px'
            },
            margin: 20
        },
        lineColor: '#232323',
        events: {
            setExtremes: function (event) {
                chart.resetZoom.element.setAttribute('display', 'inline');
                chart.dragToZoom.element.setAttribute('display', 'none');
                chart.resetZoomButton.hide();
            }
        },
        tickColor: '#232323',
        gridLineColor: '#d3d3d3',
        labels: {
            style: {
                fontWeight: 'normal',
                color: '#232323',
                fontFamily: 'Arial',
                fontSize: '10px'
            }
        },
        lineWidth: 1,
        type: 'datetime',
        allowDecimals: false,
        tickWidth: 1,
        tickmarkPlacement: 'on'
    },
    series: [{
        stickyTracking: false,
        borderColor: '#ffffff',
        pointPadding: 0.0,
        marker: {
            lineColor: '#232323',
            symbol: 'diamond',
            radius: 4.0
        },
        shadow: true,
        borderWidth: 1.0,
        name: 'Data1',
        data: [{
            y: 91.35,
            x: 1334098800000
        }, {
            y: 84.62,
            x: 1334185200000
        }, {
            y:...